<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script>
         function Dog(name, sex) {
             this.name = name;
             this.sex = sex;
         }
         Dog.prototype.call = function () {
             console.log('狗叫');
         }
         let dog1 = new Dog('kk','公');
         dog1.call();
         let dog2 = new Dog('hh','母');
         setInterval(() => {
            dog2.call()
         },2000);
    </script>
</body>
</html>